Yes, studded tires are legal in Idaho but strictly regulated by state and local traffic codes. Idaho Code § 49-949 permits studded tires from October 1 to April 30, aligning with seasonal winter road conditions. The Idaho Transportation Department (ITD) enforces compliance, while local jurisdictions may impose additional restrictions in urban areas like Boise or Coeur d’Alene to mitigate road damage.
Key Regulations for Studded Tires in Idaho
- Seasonal Window: Operation permitted only between October 1 and April 30, with exceptions for emergency vehicles.
- Stud Specifications: Tires must have studs no longer than 1/16 inch (1.6 mm) protruding from the tread, per ITD Rule 39-03.05.
- Local Restrictions: Cities such as Boise may prohibit studded tires on designated routes (e.g., downtown core) to protect pavement integrity, as outlined in municipal ordinances revised in 2023.
Non-compliance risks a $57.50 fine under Idaho’s traffic infraction schedule, per ITD’s 2024 enforcement guidelines. Out-of-state drivers must adhere to these rules, as reciprocity does not exempt them from local regulations. The ITD’s 2026 winter road safety initiative includes enhanced studded tire monitoring via automated traffic enforcement cameras in high-traffic corridors.